11 78 510 Replacing oxygen control sensor (M52TU / M54 / M56)

WARNING: This page is about a different car, the 2002 BMW Z3 and 2001 BMW Z3. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

For Special Tool identification, see SPECIAL TOOLS - Z3 .

Special Tools Required:

11 7 020

Check function of Digital Engine Electronics (DME). Refer to CHECKING - SETTING ENGINE .

Read out fault memory, clear if necessary.

Fig 1: Releasing Oxygen Control Sensor With Special Tool 11 7 020

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: The plug connection must be disconnected before the oxygen control sensor is removed.

If the plug connection separation point is below the cover for the fuel injectors:

If necessary, remove lower section of microfilter housing.

Remove cover from fuel injectors.

Unclip oxygen control sensor cable from retainer.

Disconnect plug connection for oxygen control sensor.

Release oxygen control sensor with special tool 11 7 020.

Installation:

The threads of new oxygen sensors are already coated with Never Seez Compound.

If an oxygen sensor is used again, apply a thin and even coat of Never Seez Compound to the thread only.

Part of oxygen control sensor which projects into exhaust system branch must not be cleaned or come into contact with lubricant.

Fig 2: Securing Oxygen Control Sensor With Special Tool 11 7 020

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Secure oxygen control sensor with special tool 11 7 020.

Tightening torque, refer to 11 78 1AZ in EMISSIONS CONTROL OXYGEN .

Pay attention to cable routing of oxygen control sensor.